Similarly, rename the following as well: 1. JSDollarVM ==> JSUnderscoreDbg. 2. JSDollarVMPrototype ==> JSUnderscoreDbgPrototype. 2. Options::useDollarVM ==> Options::useUnderscoreDbg.
Nevermind. I don't need to do this because I've found a way to use the @$vm name in builtins.